Fiscal Policy: Taxation

Taxation is the primary means by which governments raise revenue to fund public services and redistribute income. For A-Level Economics, you need to understand the different types of tax, the distinction between progressive, regressive, and proportional systems, the economic effects of taxation, and the theoretical framework provided by the Laffer curve.

Key Definition: A tax is a compulsory levy imposed by the government on individuals or firms. It transfers purchasing power from the private sector to the public sector.

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Direct and Indirect Taxes

Feature	Direct Taxes	Indirect Taxes
Definition	Levied on income, profits, or wealth	Levied on spending on goods and services
Examples	Income tax, corporation tax, capital gains tax, inheritance tax, National Insurance	VAT, excise duties (fuel, alcohol, tobacco), customs duties, air passenger duty
Who pays?	The person or firm on whom the tax is levied	The consumer (though the incidence may be shared with producers)
Avoidability	Cannot easily be avoided (mandatory on earned income)	Can be partially avoided by changing spending patterns
Administrative cost	Relatively high (PAYE system, self-assessment)	Relatively low (collected by businesses at point of sale)

The Tax Incidence

The incidence of a tax refers to who ultimately bears the burden. With indirect taxes, the incidence depends on the price elasticity of demand and supply.

• If demand is price inelastic (e.g., petrol, cigarettes), consumers bear most of the tax burden because they cannot easily reduce consumption.
• If demand is price elastic (e.g., luxury goods), producers bear more of the burden because raising prices would cause a large fall in quantity demanded.

Exam Tip: When discussing indirect taxes, always consider the elasticity of demand. A tax on cigarettes (PED inelastic) raises significant revenue and is largely borne by consumers. A tax on luxury yachts (PED elastic) may raise little revenue as consumers switch to alternatives.

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Progressive, Regressive, and Proportional Taxes

Progressive Taxation

A progressive tax takes a larger proportion of income from higher earners than from lower earners. The UK income tax system is progressive:

Band (2023-24)	Taxable Income	Rate
Personal allowance	Up to £12,570	0%
Basic rate	£12,571 – £50,270	20%
Higher rate	£50,271 – £125,140	40%
Additional rate	Over £125,140	45%

A person earning £100,000 pays a higher proportion of their income in tax than a person earning £20,000. This is because the marginal rate of tax increases with income.

Advantages: Reduces income inequality; based on ability to pay; raises more revenue from those who can afford it.

Disadvantages: May create disincentive effects at high marginal rates; can lead to tax avoidance and evasion; may discourage entrepreneurship and risk-taking.

Regressive Taxation

A regressive tax takes a larger proportion of income from lower earners than from higher earners, even if the absolute amount paid is the same or less. VAT is regressive in practice because lower-income households spend a higher proportion of their income on consumption, while higher-income households save a larger share.

Example: A flat-rate VAT of 20% on a £100 purchase costs £20 regardless of income. For someone earning £15,000, this represents 0.13% of their annual income. For someone earning £150,000, it represents only 0.013%.

Exam Tip: Be precise: regressive does not mean the poor pay more in absolute terms — it means they pay a higher proportion of their income. This is a common error in exam answers.

Proportional Taxation

A proportional (or flat) tax takes the same proportion of income from all earners, regardless of income level. A flat income tax rate of 20% on all income would be proportional. Few taxes are perfectly proportional in practice, though some countries (e.g., Estonia, with a 20% flat income tax) have adopted systems that approximate this.

Tax Type	Proportion Paid by Low Earners	Proportion Paid by High Earners	Example
Progressive	Lower	Higher	UK income tax
Regressive	Higher	Lower	VAT, excise duties
Proportional	Same	Same	Flat tax (theoretical)

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Adam Smith's Canons of Taxation (1776)

In The Wealth of Nations (1776), Adam Smith set out four principles — or canons — that a good tax system should follow. These remain influential in evaluating modern tax policy.

1. Canon of Equity (Fairness)

Taxes should be levied according to ability to pay. Those with higher incomes should pay proportionally more. This principle underpins the case for progressive taxation.

2. Canon of Certainty

The amount, timing, and method of payment should be clear and predictable to the taxpayer. Uncertainty creates anxiety and enables corruption. Modern PAYE systems largely satisfy this canon.

3. Canon of Convenience